Impeovement in tbeatinq bone-black foe



'GHARLES B. ORYIS, OF' ST. LOUIS, MlSSOURI, ASSIGNOR TO JOHN B.

DAVIDSON, 0F SAME PLACE. Letters Patent No (39,113, dated Sq iembcr 2-1:, 1867; (micdatad September 1-3, 1 867.

IMPROVEMENT liN TREATING BONE-BLACK FOR PILTERING SUGAR.

El e Srigrhulc ram sh in in ilgrsr Zfrttrrs igiatrntimt making part of ti t smut.

TO ALL WHOM IT MAY CONCERN:

. Be it known that I, CHARLES l3. Onvrs, of theeityand county of St. Louis, and State of Missouri, have invented anew and useful Defecating Compound for Filtering Cane-Juice or other saccharine sirups; and I do hereby declare the following to he a full and exactdescription thereof.

Hy'inrention relates to a novel preparation of b0ne-hl:1ck ,for def'ecating saccharine juices and sirups, and clearing the same of sedimentary and chemical impurities in such a manner as to greatly improve their crystallizing properties, and it is especially adapted to the preparation of sorghum-juice for granulation into sugar.

In using ordinary bone-blacl-z'as a defecator with sorghum sirups, ithecomes rapidly clogged with, the'impurities so asto require oft-repeated renewal. My invention obviates this difficulty, so. that the hone-black may be used five or ten times as long, and at the same time obtain better results. It consists in the treatment and preparation of bone-black with sulphuric acid, and the use of this acidulated bone-black as a filtering compound, through which I pass the juieeor siru-p to be clarified. In preparing my acidulated bone-black for use I simply saturate the bone-black with a weak dilution of sulphuric acid, the proportion of acid to the boneialackbeing about one-half ounce of former to-ahout two hundred pounds of the latter, water-being added to the acid in sufiicient quantity to obtain a solution capable of saturating the given quality of hone-black. After saturation the hone-black is carefully dried, and is then ready for use. If old sirup is to be filtered through this compound 'it should he first-diluted with water.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent is The defecating composition prepared substantially as herein set forth.

CHAS. B- vORVIS. Witnesse'sr i M. RANDOLPH,- Y Omsk H. Borne. 

